Retaining envelop or cover for storage-battery electrodes.



E. W. SMITH.

RETAINING ENVELOP 0R COVER FOB. STORAGE BATTERY ELECTRODES. APPLICATION FILED JULY 7, 1911,

1,086, 4, Patented Feb. 10, 1914,

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EDWARD WANTON SMITH, 0F PHILADELYHIA, PENNSYLVANIA.

RETAINING ENVELOP OB COVER FOR STORAGE-BATTERY ELECTRODES.

rosesea'.

To all whomit may concern:

Be it known that I, EDWARD \VAN'roN SMITH, a citizen of the United States, and a resident of Philadelphia, in' the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements -in Retaining Envelops or Covers for Storage-Battery Electrodes, of which the following'is a specification.

The present invention is an improvement upon the envelops or covers forming the subjectmatter of an application for a patent serially numbered 636,469, filed on the first day of July 1911 by me jointly with Edward G. Steinmetz, and the principal object of the present invention is to increase the inherent strength and the longitudinal rigidity of the tubes, .envelops or covers as a whole and to provide for better holding the minute crevices or pores in proper relation and at the same time to provide the tubes with integral means for spacing the electrodes in respect to each other.

The present invention is applicable to the various embodiments illustrated and described in the prior application above represent invention is' made.

ferred to,but a preferred embodiment of the present invention is illustrated in the accompanying drawings in which- Figure 1, is a side view of a blank from which a cover or envelop embodying the Fig. 2, is a cross-section taken on the line 2-2 of Fig. 1.' Fig. 3, is a side view of a finished cover or envelop embodying features of the present invention, and Fig. 4-, is a cross-section taken on the line H of Fig. 3.

In the drawings 1 is the blank and it consists of an insulating tube having a smooth bore and externally provided with projecting ribs 2 which. range or-extend longitudinally or generally axially of the tube and project out from the outer surface of the tube. The blank is, as has been said,-

Specification of Letters Patent.

Application filed July 7, 1911.

Patented nee. io, ieia. Serial No. 637,249.

of insulating material which should be possessed of the requisite elasticity, strength and non-corrosive or acid resisting properties. Hard rubber is an example of a suitable material from which to make the tube.

The tube is provided with minute pores or preferably crevices 3,.the width of the pores or crevices being small in comparison with the thickness of the wall. As a matter.

of description and not of limitation it may be said that for a wall one-thirty second of an inch thick, an elongated opening from v two-one hundredths to one-one hundredths of an inch or less in width is appropriate and in any case the width of the opening is less than the thickness of the wall. The pores or crevices 3, as shown, range or run circumferentially between the ribs. The ribs by holding the imperforate portion 4: between the pores or crevices in proper spaced relation insure the. proper opening of the pores or crevices. 'Since' the ribs project there is left after the formation of the pores or 'slots, sufficient cross-section, as at 5, for imparting inherent strength and longitudinal rigidity to the slotted,

EDWARD WANTON suns,

Witnesses:

Bnuon F0111), LOUIS H. FLANDEIIS. 

